Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:32

General

  • Target

    d44236eeb92cc872600b3d0ae889c11912c1bb08c9a0f9c1657c9e2d58466879.exe

  • Size

    291KB

  • MD5

    3fff6b68ec9d18f01572e95e28bcda01

  • SHA1

    8e882c3a22ced47fb0d1ef77e5b4fa929c1fb2c1

  • SHA256

    d44236eeb92cc872600b3d0ae889c11912c1bb08c9a0f9c1657c9e2d58466879

  • SHA512

    2a8ad523c74dc5c52ec6f817779254bb8b89efbcede5d1e4cdce256e040ac98e9e9b477f25a41d26d837d43facaf20ee651607e3113f3b58ad32789e031cea73

  • SSDEEP

    3072:Eb8yXVzi6JLd9LBOr59azRrCLneVsXJnEmtGHJ/JVeECaCb7HBr4u0hlb6C:lMiULdVsV9azRkRX9FupfevbTBdop6

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies data under HKEY_USERS 5 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d44236eeb92cc872600b3d0ae889c11912c1bb08c9a0f9c1657c9e2d58466879.exe
    "C:\Users\Admin\AppData\Local\Temp\d44236eeb92cc872600b3d0ae889c11912c1bb08c9a0f9c1657c9e2d58466879.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1740
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xpsdollu\
      2⤵
        PID:1756
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ahgtbbjn.exe" C:\Windows\SysWOW64\xpsdollu\
        2⤵
          PID:1248
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create xpsdollu binPath= "C:\Windows\SysWOW64\xpsdollu\ahgtbbjn.exe /d\"C:\Users\Admin\AppData\Local\Temp\d44236eeb92cc872600b3d0ae889c11912c1bb08c9a0f9c1657c9e2d58466879.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2960
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description xpsdollu "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2676
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start xpsdollu
          2⤵
          • Launches sc.exe
          PID:2664
        • C:\Windows\SysWOW64\netsh.exe
          "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
          2⤵
          • Modifies Windows Firewall
          PID:2712
      • C:\Windows\SysWOW64\xpsdollu\ahgtbbjn.exe
        C:\Windows\SysWOW64\xpsdollu\ahgtbbjn.exe /d"C:\Users\Admin\AppData\Local\Temp\d44236eeb92cc872600b3d0ae889c11912c1bb08c9a0f9c1657c9e2d58466879.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2656
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2484

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\ahgtbbjn.exe
        Filesize

        14.1MB

        MD5

        ddb0b3a4f96143872bfe11df90b53e7e

        SHA1

        685bb232b5ce774f61d2e311cece3deb09af9c23

        SHA256

        07bdc7db5451e1f194a6c41737765586f687b0d91cce51ec89739b004c28c808

        SHA512

        7979bc1c4d6fb21c737006064abb4c057be462de469645a919af5981b77c44cfadf388dc6e145443455818c4a89afa2ad4bed53c3a2363fccb2121946cf35bb5

      • memory/1740-1-0x0000000000970000-0x0000000000A70000-memory.dmp
        Filesize

        1024KB

      • memory/1740-3-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1740-4-0x0000000000400000-0x00000000007D2000-memory.dmp
        Filesize

        3.8MB

      • memory/1740-7-0x0000000000400000-0x00000000007D2000-memory.dmp
        Filesize

        3.8MB

      • memory/2484-45-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-37-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-11-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2484-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2484-14-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2484-58-0x00000000002E0000-0x00000000002E7000-memory.dmp
        Filesize

        28KB

      • memory/2484-19-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2484-20-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2484-22-0x00000000019D0000-0x0000000001BDF000-memory.dmp
        Filesize

        2.1MB

      • memory/2484-25-0x00000000019D0000-0x0000000001BDF000-memory.dmp
        Filesize

        2.1MB

      • memory/2484-26-0x0000000000190000-0x0000000000196000-memory.dmp
        Filesize

        24KB

      • memory/2484-29-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-32-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-33-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-34-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-35-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-36-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-57-0x0000000005500000-0x000000000590B000-memory.dmp
        Filesize

        4.0MB

      • memory/2484-40-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-39-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2484-38-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-41-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-43-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-42-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-44-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-54-0x0000000005500000-0x000000000590B000-memory.dmp
        Filesize

        4.0MB

      • memory/2484-46-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-47-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-49-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-48-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2484-50-0x0000000000270000-0x0000000000275000-memory.dmp
        Filesize

        20KB

      • memory/2484-53-0x0000000000270000-0x0000000000275000-memory.dmp
        Filesize

        20KB

      • memory/2656-9-0x00000000009A0000-0x0000000000AA0000-memory.dmp
        Filesize

        1024KB

      • memory/2656-10-0x0000000000400000-0x00000000007D2000-memory.dmp
        Filesize

        3.8MB

      • memory/2656-15-0x0000000000400000-0x00000000007D2000-memory.dmp
        Filesize

        3.8MB